To find out how many bows Samantha can make, you need to divide the total amount of ribbon she has (83.2 meters) by the amount of ribbon needed for each bow (1.28 meters).
\[ \text{Number of bows} = \frac{\text{Total ribbon}}{\text{Ribbon per bow}} = \frac{83.2}{1.28} \]
Now, let's perform the division:
\[ 83.2 \div 1.28 = 65 \]
Therefore, the number of bows she can make is 65.
The correct answer is C. 65.